diff --git a/spec/unit/location.spec.ts b/spec/unit/location.spec.ts
index 823149960..a58b605e6 100644
--- a/spec/unit/location.spec.ts
+++ b/spec/unit/location.spec.ts
@@ -17,7 +17,7 @@ limitations under the License.
 import { makeLocationContent } from "../../src/content-helpers";
 import {
     ASSET_NODE_TYPE,
-    ASSET_TYPE_SELF,
+    LocationAssetType,
     LOCATION_EVENT_TYPE,
     TIMESTAMP_NODE_TYPE,
 } from "../../src/@types/location";
@@ -33,14 +33,14 @@ describe("Location", function() {
             uri: "geo:foo",
             description: undefined,
         });
-        expect(ASSET_NODE_TYPE.findIn(loc)).toEqual({ type: ASSET_TYPE_SELF });
+        expect(ASSET_NODE_TYPE.findIn(loc)).toEqual({ type: LocationAssetType.Self });
         expect(TEXT_NODE_TYPE.findIn(loc)).toEqual("txt");
         expect(TIMESTAMP_NODE_TYPE.findIn(loc)).toEqual(134235435);
     });
 
     it("should create a valid location with explicit properties", function() {
         const loc = makeLocationContent(
-            "txxt", "geo:bar", 134235436, "desc", "m.something");
+            "txxt", "geo:bar", 134235436, "desc", LocationAssetType.Pin);
 
         expect(loc.body).toEqual("txxt");
         expect(loc.msgtype).toEqual("m.location");
@@ -49,7 +49,7 @@ describe("Location", function() {
             uri: "geo:bar",
             description: "desc",
         });
-        expect(ASSET_NODE_TYPE.findIn(loc)).toEqual({ type: "m.something" });
+        expect(ASSET_NODE_TYPE.findIn(loc)).toEqual({ type: LocationAssetType.Pin });
         expect(TEXT_NODE_TYPE.findIn(loc)).toEqual("txxt");
         expect(TIMESTAMP_NODE_TYPE.findIn(loc)).toEqual(134235436);
     });
diff --git a/src/@types/location.ts b/src/@types/location.ts
index e1c2601be..09ef31171 100644
--- a/src/@types/location.ts
+++ b/src/@types/location.ts
@@ -27,7 +27,10 @@ export const ASSET_NODE_TYPE = new UnstableValue("m.asset", "org.matrix.msc3488.
 
 export const TIMESTAMP_NODE_TYPE = new UnstableValue("m.ts", "org.matrix.msc3488.ts");
 
-export const ASSET_TYPE_SELF = "m.self";
+export enum LocationAssetType {
+    Self = "m.self",
+    Pin = "m.pin",
+}
 
 /* From the spec at:
  * https://github.com/matrix-org/matrix-doc/blob/matthew/location/proposals/3488-location.md
@@ -60,7 +63,7 @@ export interface ILocationContent extends IContent {
         description?: string;
     };
     [ASSET_NODE_TYPE.name]: {
-        type: string;
+        type: LocationAssetType;
     };
     [TEXT_NODE_TYPE.name]: string;
     [TIMESTAMP_NODE_TYPE.name]: number;
diff --git a/src/content-helpers.ts b/src/content-helpers.ts
index 6621520a7..89955bbae 100644
--- a/src/content-helpers.ts
+++ b/src/content-helpers.ts
@@ -20,8 +20,8 @@ import { MsgType } from "./@types/event";
 import { TEXT_NODE_TYPE } from "./@types/extensible_events";
 import {
     ASSET_NODE_TYPE,
-    ASSET_TYPE_SELF,
     ILocationContent,
+    LocationAssetType,
     LOCATION_EVENT_TYPE,
     TIMESTAMP_NODE_TYPE,
 } from "./@types/location";
@@ -121,7 +121,7 @@ export function makeLocationContent(
     uri: string,
     ts: number,
     description?: string,
-    assetType?: string,
+    assetType?: LocationAssetType,
 ): ILocationContent {
     return {
         "body": text,
@@ -132,7 +132,7 @@ export function makeLocationContent(
             description,
         },
         [ASSET_NODE_TYPE.name]: {
-            type: assetType ?? ASSET_TYPE_SELF,
+            type: assetType ?? LocationAssetType.Self,
         },
         [TEXT_NODE_TYPE.name]: text,
         [TIMESTAMP_NODE_TYPE.name]: ts,